Title:
OPTICAL ELEMENT
Document Type and Number:
WIPO Patent Application WO/2013/183457
Kind Code:
A1
Abstract:
Provided is an optical element which is characterized by comprising: an optical member that is formed of a light transmitting material; high refractive index layers and low refractive index layers that are formed to be laminated on the surface of the optical member; and a surface protective layer that is formed on the uppermost layer among the high refractive index layers and the low refractive index layers. The optical element is also characterized in that: the surface protective layer is formed of a material that contains a mixed oxide of Si and Sn; and the refractive index of the surface protective layer is not more than the refractive index of the high refractive index layers but not less than the refractive index of the low refractive index layers.
Inventors:
MASHIMO TAKAHIRO (JP)
SUZUKI SUSUMU (JP)
OSAWA MITSUO (JP)
MIYASAKA KOJI (JP)
MURAKAMI TAKAAKI (JP)
SUZUKI SUSUMU (JP)
OSAWA MITSUO (JP)
MIYASAKA KOJI (JP)
MURAKAMI TAKAAKI (JP)
Application Number:
PCT/JP2013/064412
Publication Date:
December 12, 2013
Filing Date:
May 23, 2013
Export Citation:
Assignee:
ASAHI GLASS CO LTD (JP)
International Classes:
G02B1/11; B32B9/00; C03C3/085; C03C3/087; C03C3/112; C03C17/23; G02B1/10
Foreign References:
| JPH03162943A | 1991-07-12 | |||
| JP2005266665A | 2005-09-29 | |||
| JP2009084143A | 2009-04-23 | |||
| JP2012036074A | 2012-02-23 | |||
| JP2008169061A | 2008-07-24 | |||
| JP2009271439A | 2009-11-19 | |||
| JP2005275294A | 2005-10-06 | |||
| JP2005292203A | 2005-10-20 |
Attorney, Agent or Firm:
ITOH, Tadashige et al. (JP)
Tadashige Ito (JP)
Tadashige Ito (JP)
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